Nortel BSR222, Configuration, Page: 59 / 451

Chapter 3 Wizard setup 59
Nortel Business Secure Router 222 Configuration — Basics
You can obtain your IP address from the IANA, from an ISP, or have it assigned
by a private network. If you belong to a small organization and your Internet
access is through an ISP, the ISP can provide you with the Internet addresses for
your local networks. If you are part of a much larger organization, consult your
network administrator for the appropriate IP addresses.
IP address and Subnet Mask
Similar to the way houses on a street share a common street name, computers on a
LAN share one common network number.
Where you obtain your network number depends on your particular situation. If
your ISP or network administrator assigns you a block of registered IP addresses,
follow their instructions in selecting the IP addresses and the subnet mask.
If your ISP did not explicitly give you an IP network number, then most likely you
have a single user account and the ISP will assign you a dynamic IP address when
the connection is established. If this is the case, Nortel recommends that you
select a network number from 192.168.0.0 to 192.168.255.0 and you must enable
the Network Address Translation (NAT) feature of the Business Secure Router.
The Internet Assigned Number Authority (IANA) reserved this block of addresses
specifically for private use; do not use any other number unless you are told
otherwise. For example, select 192.168.1.0 as the network number; which covers
254 individual addresses, from 192.168.1.1 to 192.168.1.254 (zero and 255 are
reserved). In other words, the first three numbers specify the network number,
while the last number identifies an individual computer on that network.
Once you have decided on the network number, pick an IP address that is easy to
remember, for instance, 192.168.1.1, for your Business Secure Router, but make
sure that no other device on your network is using that IP address.
Note: Regardless of your particular situation, do not create an arbitrary
IP address; always follow the guidelines above. For more information
about address assignment, refer to
Address Allocation for Private
Internets (RFC 1597), and Guidelines for Management of IP Address
Space (RFC 1466 ) .